What is CVE-2026-26105?

CVE-2026-26105 is a high-severity vulnerability in Microsoft Sharepoint Enterprise Server 2016, classified under Cross-site Scripting. CVSS score: 8.1/10. Published 2026-03-10.

How severe is CVE-2026-26105?

High severity. CVSS v3 base score is 8.1 out of 10.

XSS in Microsoft Sharepoint Enterprise Server 2016

CVE-2026-26105

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (21.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C.

Affected products

Microsoft Sharepoint Enterprise Server 2016 — versions 16.0.0
Microsoft Sharepoint Server 2019 — versions 16.0.0
Microsoft Sharepoint Server Subscription Edition — versions 16.0.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Microsoft SharePoint Server Spoofing Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-26105?: CVE-2026-26105 is a high-severity vulnerability in Microsoft Sharepoint Enterprise Server 2016, classified under Cross-site Scripting. CVSS score: 8.1/10. Published 2026-03-10.
How severe is CVE-2026-26105?: High severity. CVSS v3 base score is 8.1 out of 10.